Subject: Re: [linux-audio-dev] new realtime scheduling policy
From: Martijn Sipkema (msipkema_AT_sipkema-digital.com)
Date: Tue Mar 18 2003 - 11:04:08 EET
> so i've tried to make a new scheduling policy for linux. i've
> called it SCHED_USERFIFO. the intent is basically to allow a process
> ask for x amount of processor time out of every y jiffies. (the user
> part is in the hope that the administrator can set rlimits on the
> amount of percentage of time requested and allow non-priviledged users
> to use this policy without being able to complete hang the box).
>
> it works just like SCHED_FIFO as long as the process doesn't take
> more than the amount of time it asked for. if it does try to take
> more time, it is allowed to be preempted until the period is over.
This is somewhat similar to the SCHED_SPORADIC.
On a related note, I found this paper:
http://marte.unican.es/appsched-proposal.pdf
I'm not sure how much work it would be to implement this for Linux,
but it would certainly be nice to have. An EDF scheduler would be
ideal for asynchronous audio processing (large fft blocks, etc.).
--ms
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